US2543665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure and relief valve arrangement
Assignee: Individual
•
Filing: 1948-03-03
•
Granted: 1951-02-27
•
Expires: 1968-03-03
Abstract
No abstract record available.
Inventors
- 👤 Marvin W Meierhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:34
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779; Y10T137/778; Y10T137/7837; Y10T137/7838; Y10T137/7839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1890870A
Cited
US1929462A
Cited
US1902258A
Cited
US2112641A
Cited
US2152422A
Cited
US2188022A
Cited
US2160684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |